Safety control method for TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system

Abstract

The invention discloses a safety control method for a TRT (Blast Furnace Top Gas Recovery Turbine Unit) fixed blade servo control system. In the method, when a TRT unit runs normally, blast furnace top pressure is adjusted and controlled by the TRT unit fixed blade servo control system; when the TRT unit fixed blade system fails, an electro-hydraulic servo valve quits the control over a fixed blade executing mechanism; a PLC (Programmable Logic Controller) system of the TRT unit outputs a control signal to a bypass electromagnetic valve; the furnace top pressure is restored to be stable undermain adjustment of a blast furnace pressure reducing valve bank and auxiliary adjustment of the bypass electromagnetic valve; operating personnel check on line and manually repair; and if the system cannot be normally restored in a short time, the TRT unit is emergently stopped. According to the method disclosed by the invention, the fixed blade servo system can be checked without stop, the reason of failure and the finally adopted measure are determined, and unnecessary frequent stop of the TRT unit can be avoided. By applying the method, the safety of the system during emergency failure of the fixed blade servo control system can be greatly enhanced; and according to site validation put into operation, the production safety of blast furnace smelting is greatly guaranteed by the method.

Description

technical field [0001] The invention belongs to the field of a blast furnace gas residual pressure energy recovery device (TRT unit for short), and relates to a safety control method, in particular to a safety control method for a stator blade servo control system of a TRT unit. Background technique [0002] Blast furnace smelting is the pillar of the iron and steel industry. TRT unit is a major energy-saving equipment for blast furnace smelting. With the rapid development of industrial control technology, the safety requirements for equipment are constantly improving. Interfere with the normal production of the blast furnace, but also maximize power generation. During the normal operation of the existing TRT unit, the top pressure of the blast furnace (referred to as blast furnace top pressure) is controlled by the stator blade servo control system of the TRT unit. This control method can meet the blast furnace top pressure when the unit stator blade servo control system is...

AI Technical Summary

Problems solved by technology

During the normal operation of the existing TRT unit, the top pressure of the blast furnace (referred to as blast furnace top pressure) is controlled by the stator blade servo control system of the TRT unit. This control method can meet the blast furnace top pressure when the unit stator blade servo control system is normal. However, when an emergency failure occurs in the stator servo control system, such as the failure of the stator servo controller, the failure of the electro-hydraulic servo valve, etc., it will cause the TRT unit stator actuator to open or close quickly, which will greatly The threat to the production safety of blast furnace smelting and the normal operation of TRT unit

But at present, there is no effective method to solve the control of the top pressure of the blast furnace when the servo control system of the stator blades has an emergency failure.

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